71072110091 has 4 divisors (see below), whose sum is σ = 71074104672. Its totient is φ = 71070115512.

The previous prime is 71072110007. The next prime is 71072110097. The reversal of 71072110091 is 19001127017.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71072110091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71072110097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942851 + ... + 1015436.

It is an arithmetic number, because the mean of its divisors is an integer number (17768526168).

Almost surely, 2^71072110091 is an apocalyptic number.

71072110091 is a deficient number, since it is larger than the sum of its proper divisors (1994581).

71072110091 is a wasteful number, since it uses less digits than its factorization.

71072110091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994580.

The product of its (nonzero) digits is 882, while the sum is 29.

The spelling of 71072110091 in words is "seventy-one billion, seventy-two million, one hundred ten thousand, ninety-one".